Week 10 Superficial muscles of the trunk, anterior view A woman pregnant for the first time tells you that she is in excellent health and asks you why it is necessary to increase her calcium intake during her pregnancy. What should you tell this patient? How is the true bone formed during fetal development? What can help slow the progression of musculoskeletal changes associated with aging? You are observing an examiner take the history of a 70-year-old man as part of the musculoskeletal examination. You notice that the examiner asks the patient about exercise habits in his early years. Is this a relevant question to ask this patient? Why or why not? A young woman is concerned about a 1-cm difference in the length of her legs. What is the best response to give this patient? Which test is used to detect a torn medial or lateral meniscus? A 12-year-old boy has injured his right leg in an automobile accident. If the epiphysis is damaged, what can eventually occur? What does the bulge sign look to detect? A positive Tinel sign is suggestive of which disorder? What are the symptoms of fibromyalgia? What are the risk factors for sports injury? JB is a 43-year-old patient who presents to the office with complaints of back pain. She states that the pain started a few months ago as a dull ache, and now she feels that it has progressed to her hands, feet, and hips. The patient is obese and has a family history of joint pain. You have diagnosed her with osteoarthritis. 1- Describe the etiology of osteoarthritis. 2- Differentiate between signs and symptoms of osteoarthritis and rheumatoid arthritis. 3- Because JB is having pain in her back, describe an indicator of a weakened muscle group.

1. The increased calcium intake during pregnancy is necessary for several reasons. First, calcium is crucial for the development of the fetal skeletal system, as the growing baby needs a sufficient amount of calcium to form strong bones and teeth. Additionally, calcium plays a vital role in muscle contractions, nerve function, and blood clotting, all of which are important for both the mother and the baby during pregnancy. Furthermore, the mother’s body will transfer calcium to the baby through the placenta, so the mother needs to ensure she has enough calcium to meet both her own needs and those of the growing fetus.

2. During fetal development, true bone formation occurs through a process called ossification. There are two types of ossification: intramembranous ossification and endochondral ossification. In intramembranous ossification, bone is formed directly from mesenchymal tissue, which is a type of embryonic connective tissue. This process occurs mainly in the flat bones of the skull and face. In endochondral ossification, bone is formed from a preexisting cartilage template. Initially, hyaline cartilage serves as a model for bone formation, and as the process progresses, the cartilage is gradually replaced by bone tissue.

3. To slow down the progression of musculoskeletal changes associated with aging, several factors can be beneficial. One key factor is regular exercise and physical activity. Engaging in activities that promote strength, flexibility, and balance can help maintain muscle mass, joint mobility, and overall physical function. Additionally, maintaining a healthy diet that includes adequate nutrient intake, especially calcium and vitamin D, can support bone health and prevent conditions such as osteoporosis. It is also important to avoid excessive stress on the joints and muscles, practicing good posture, and managing any chronic conditions or underlying health issues that may impact musculoskeletal health.

4. Asking a 70-year-old man about his exercise habits in his early years is a relevant question in the musculoskeletal examination. The history of exercise habits can provide important information about the patient’s physical activity level, overall fitness, and lifestyle choices that may have influenced his musculoskeletal health over the years. It can also help identify any previous injuries or conditions related to exercise that may impact the current musculoskeletal status. Understanding the patient’s exercise history can assist in tailoring treatment plans, providing appropriate recommendations for exercise, and addressing any specific concerns or risk factors that may be relevant to the patient’s age and health status.

5. In response to a young woman concerned about a 1-cm difference in the length of her legs, the best approach would be to conduct a thorough evaluation to determine the cause of the leg length discrepancy. Leg length discrepancies can occur due to various factors, including developmental issues, trauma, or other underlying conditions such as scoliosis or hip dysplasia. The evaluation may involve physical examination, measurements, and imaging studies to identify any structural abnormalities and guide appropriate management, which could include orthotic devices, physical therapy, or surgical intervention, depending on the specific cause and severity of the discrepancy.

6. The test used to detect a torn medial or lateral meniscus is called the McMurray test. During this test, the examiner manipulates the knee joint by rotating the lower leg while applying pressure, which can elicit pain or a clicking sensation if there is a tear in the meniscus. The McMurray test helps evaluate and diagnose meniscus injuries, which are common in sports or activities that involve twisting or rotational movements of the knee.

7. If the epiphysis is damaged in a 12-year-old boy’s right leg due to an automobile accident, one potential long-term consequence is growth disturbance. The epiphysis is the area of bone growth in children, responsible for the lengthening of the bone. Damage to the epiphysis can disrupt this growth and result in a significant limb length discrepancy or other skeletal deformities. Prompt medical attention and appropriate treatment are crucial to minimize the risk of long-term complications and promote optimal healing and growth.

8. The bulge sign is a physical examination technique used to detect the presence of joint effusion, specifically in the knee joint. During this test, the examiner strokes the medial aspect of the knee to displace any fluid present, and then strokes the lateral aspect of the knee. If there is a small amount of joint effusion, a visible bulge of fluid can be observed on the medial side of the knee when the lateral side is stroked. The bulge sign is an indicator of the presence of fluid within the joint, which can be caused by various conditions such as injury, inflammation, or infection.

9. A positive Tinel sign is suggestive of a peripheral nerve disorder, specifically nerve compression or irritation. The Tinel sign is a physical examination maneuver in which the examiner taps or applies pressure over a peripheral nerve to provoke symptoms such as tingling, numbness, or a “pins and needles” sensation. This sign is commonly used to assess conditions such as carpal tunnel syndrome, cubital tunnel syndrome, or tarsal tunnel syndrome, where a nerve is compressed or irritated at a specific location along its course.

10. Fibromyalgia is a chronic pain disorder characterized by widespread musculoskeletal pain, fatigue, sleep disturbances, and tenderness of specific trigger points. Other common symptoms may include cognitive difficulties, mood disturbances, and gastrointestinal issues. The exact cause of fibromyalgia is unknown, but it is believed to involve a combination of genetic, physiological, and psychological factors. Diagnosis is typically made based on the patient’s symptoms, physical examination findings, and exclusion of other potential underlying conditions.

11. The risk factors for sports injury can vary depending on the type of sport, individual factors, and environmental conditions. Some common risk factors include inadequate warm-up or conditioning, improper technique or equipment use, repetitive or overuse movements, poor physical fitness or muscle imbalance, previous history of injury, and environmental factors such as playing surface or weather conditions. Understanding and addressing these risk factors through proper training, conditioning, and injury prevention strategies can help reduce the likelihood of sports-related injuries.